| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] long periods [prep] | 53 |
|
| 2 | [noun] [prep] long period [prep] | 53 |
|
| 3 | [noun] [prep] long period [prep] | 47 |
|
| 4 | [noun] [prep] long period of | 42 |
|
| 5 | [noun] [prep] long period of | 42 |
|
| 6 | [noun sg] [prep] long period [prep] | 32 |
|
| 7 | [noun] for long period [prep] | 31 |
|
| 8 | [noun pl] [prep] long period [prep] | 19 |
|
| 9 | [noun] over long period [prep] | 15 |
|
| 10 | [noun] [prep] longer period [prep] | 6 |
|
